Efficient positive-pressure pneumatic conveying system of pebble coal

The utility model relates to an efficient positive-pressure pneumatic conveying system of pebble coal, wherein the efficient positive-pressure pneumatic conveying system of the pebble coal is used for discharging of the pebble coal of a medium speed coal mill in a heat-energy plant. The efficient positive-pressure pneumatic conveying system of the pebble coal comprises a pebble coal bunker, wherein the upper end of the pebble coal bunker is connected with a pebble coal outlet of the medium speed coal mill. An outlet formed at the lower end of the pebble coal bunker is connected with a feeding device, wherein an inlet formed at the front end of the feeding device is connected with a compressed air pipe, an outlet formed at the rear end of the feeding device is connected with a pebble coal scuttle through a conveying pipe, and a gas outlet of the pebble coal scuttle passes by a dirt catcher and then exhausts air. The efficient positive-pressure pneumatic conveying system of the pebble coal overcomes the defects of an original negative-pressure pneumatic conveying system. The efficient positive-pressure pneumatic conveying system of pebble coal is low in energy consumption, little in noise, high in reliability, and good in conveying capacity. Utilization of loose air ducts enhances the conveying capacity of the system air ducts and guarantees that failure of the system can be resolved. A pebble coal bunker vibrating screen can effectively eliminate materials which are not appropriate for pneumatic conveyance and guarantees that the system is not blocked.